Ward off, 阻挡 。
"A new study shows that more social activity with friends can help ward off obesity," 一项新研究显示，更多跟朋友一起参加社交生活，有助于防止肥胖。秋天又到打流感疫苗的时候了，但是今年，
"Instead of flu vaccination, doctors are advocating natural methods to ward off the flu this year," 今年医生提倡以自然免疫的方法抵挡流感，而不是注射流感疫苗。
"Frequent hand-washing is one of the easiest ways to ward off sickness," 常洗手是防止生病的最简单的办法之一。
好的，今天我们学习的词是ward off.